Parasitology Exam

flagellates, amoebae, sporozoans, ciliates, opalinids

I.  Identify the following organisms. (40 points)

1.  earthworms, Heterakis

2.  commensal, colon, flagella, cysts

3.  Taliaferro, ablastin

4.  Glossina morsitans, Kenya

5.  two nuclei, large intestine, mild pathogen?, hyperparasitism

6.  anterior station, Gambia

7.  Brazil, phlebotomine flies

8.  beavers, octaflagellated, vitamin deficiency

9.  6 flagella, axostyle

10  nasopharyngeal  ulcers, LD bodies

11.  intestine, liver, Monocercomonadidae

12.  India, cutaneous, sandflies

13.  venereal disease, flagellated, undulating membrane, kinetoplast

14.  trypomastigotes, dyskinetoplasty, South America

15.  African ruminants, Glossina swynertonni

16.  lumbermen, Mexico

17.  amastigotes, megaesophagus

18.  spleen, liver, WBCs, intestinal lymph nodes

19.  greenish white discharge, venereal disease

20.  tabanids, camels, Trypanozoan, vampire bats

II.  Briefly discuss three epidemiological factors involved in the spread of the following organisms. (15 points)

1.  Trypanosoma cruzi

2.  Leishmania donovani

3.  Trypanosoma brucei rhodesiense

4.  Giardia lamblia

5.  Histomonas meleagridis

III.  Complete the chart. (20 points)

ORGANISM       SITE OF INFECTION      VECTOR          DISEASE          GEOGRAPHY             DIAGNOSIS

                                                                                                                         Mexico to Argentina            LD bodies

                                    duodenum                                                                        cosmopolitan

                                      heart                          triatomids        

                                                                                                  East African                                               trypomastigotes
                                                                                                 Sleeping Sickness                                             in blood

                                   spleen and liver                                                                                                               spleen biopsy

IV.  Explain how evolution plays a role in the development of host specificity.  How are zoonoses related to host specificity? (10 points)

V.  Describe the roles the following hosts play in parasitism.  Give an example of each (name of parasite and where in the life cycle that term applies).  (15 points)

1.  definitive

2.  intermediate

3.  vector

4.  paratenic

5.  reservoir